Regardless of the significance of the Jordan River dispute, there was no entire and systematic learn of the matter. What few articles were written thus far were fragmentary and primarily handled the background of the dispute. M. G. Ionides, in "The Disputed Waters of Jordan," heart East magazine, Vol.

13) shows that PCT — PE. This is illustrated by the convergence o f curves ABC and DEC at large values o f L. When the strut is very short, PE that Pcr PEf. 13) shows This is illustrated by the convergence o f curves AFG and ABC at small values o f L. 6). When the core is weak in shear, Pc — 0 and PCT — PEf\ that is, the core ceases to provide effective connection between the faces, which buckle as independent struts. BUCKLING OF SANDWICH STRUTS 53 F I G . 2. Critical load of an axially-loaded pin-ended sandwich strut.

It may also be necessary to take the effect into account when performing tests on sandwich beams to determine the shear modulus o f the core. T o discuss the nature o f this interaction between the bending stiffness o f the faces and the shear stiffness o f the core, consider first a sandwich with a core which is rigid in shear (G = « » ) and with a load qi per unit length. A deflection wi occurs in accordance with ordinary bending theory. This deflection is associated with a bending moment Mi and a shear force Qu the latter being given by: -Qi = Dw[" = £ ( / - / / ) < ' + £ / / < ' .